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Table 2 Antioxidant activity of Baizhi taproot and lateral root at three growth stages

From: Influence of harvest stage on the pharmacological effect of Angelica dahurica

Harvest stage

Taproot

Lateral root

DPPH radical scavenging capacity

 V-stage

5.70 ± 4.54a*

5.07 ± 5.20a

 B-stage

6.46 ± 3.06a

6.76 ± 5.37a

 S-stage

10.92 ± 3.82b

6.12 ± 5.12a

Fe2+ chelating capacity

 V-stage

2.52 ± 7.13a

2.55 ± 6.13a

 B-stage

1.66 ± 1.70a

1.90 ± 1.74a

 S-stage

11.94 ± 6.09b

2.65 ± 6.33a

  1. Roots were extracted with methanol and subjected to DPPH and Fe2+ chelating assay. Activity of extracts is shown as mean ± SD IC50 (mg/ml) predicted by Loess regression
  2. * Different letters indicate statistical significance (p < 0.05) by t test